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Finding the Fourth Proportional to 431,473.60, 647,210.40 and 242,516.80

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Solution

The fourth proportional to 431,473.60, 647,210.40 and 242,516.80 is: 363,775.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,473.60 : 647,210.40 = 242,516.80 : x
  2. Step 2: Convert to fraction form
    431,473.60/647,210.40 = 242,516.80/x
  3. Step 3: Cross multiply
    431,473.60x = 647,210.40 × 242,516.80
  4. Step 4: Simplify right side
    431,473.60x = 156,959,395,134.72
  5. Step 5: Solve for x
    x = 156,959,395,134.72/431,473.60
  6. Step 6: Final answer
    x = 363,775.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.